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SISTEMA DE ALTO-FALANTE E PROCESSO DE VENTILAR O MESMO

Arquivada/ExtintaInvention PatentPCT · US1995010664

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Application data

Number

PI9508771

Type

Invention Patent

Filing

08/22/1995

Publication

01/06/1998

PCT

US1995010664

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Progress at the INPI

Filing08/22/95
Publication01/06/98
Examination
Allowance07/23/02
Grant12/10/02
Expired11/24/15

The letters patent expired on 11/24/2015: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/24/2015. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

B. C. (pessoa física)

Inventors

C. C. (pessoa física)

M. J. (pessoa física)

Technical data

IPC Classification

H04R 25/00 H05K 5/00

Priority claims

08/294,412 · 08/23/1994

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 22/08/2015

11/24/2015

RPI 2342

Concessão da patente

#16.1

12/10/2002

RPI 1666

Deferimento

#9.1

07/23/2002

RPI 1646

Exigência - art. 36 da LPI

#6.1

02/13/2002

RPI 1623

Notificação de entrada na fase nacional - PCT

#1.3

01/06/1998

RPI 1411

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